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kovidgoyal · 05-20-2018, 05:44 AM

The most basic rule is: You have to make sure that only a single program is touching the calibre library at a time. That means do not run your sync tool while calibre is running and vice versa

05-20-2018, 05:44 AM	#2
kovidgoyal creator of calibre Posts: 43,866 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The most basic rule is: You have to make sure that only a single program is touching the calibre library at a time. That means do not run your sync tool while calibre is running and vice versa